include/linux/parport.h

   1 /* $Id: parport.h,v 1.1 1998/05/17 10:57:52 andrea Exp andrea $ */
   2
   3 /*
   4  * Any part of this program may be used in documents licensed under
   5  * the GNU Free Documentation License, Version 1.1 or any later version
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #ifndef _PARPORT_H_
  10 #define _PARPORT_H_
  11
  12 /* Start off with user-visible constants */
  13
  14 /* Maximum of 16 ports per machine */
  15 #define PARPORT_MAX  16
  16
  17 /* Magic numbers */
  18 #define PARPORT_IRQ_NONE  -1
  19 #define PARPORT_DMA_NONE  -1
  20 #define PARPORT_IRQ_AUTO  -2
  21 #define PARPORT_DMA_AUTO  -2
  22 #define PARPORT_DMA_NOFIFO -3
  23 #define PARPORT_DISABLE   -2
  24 #define PARPORT_IRQ_PROBEONLY -3
  25 #define PARPORT_IOHI_AUTO -1
  26
  27 #define PARPORT_CONTROL_STROBE    0x1
  28 #define PARPORT_CONTROL_AUTOFD    0x2
  29 #define PARPORT_CONTROL_INIT      0x4
  30 #define PARPORT_CONTROL_SELECT    0x8
  31
  32 #define PARPORT_STATUS_ERROR      0x8
  33 #define PARPORT_STATUS_SELECT     0x10
  34 #define PARPORT_STATUS_PAPEROUT   0x20
  35 #define PARPORT_STATUS_ACK        0x40
  36 #define PARPORT_STATUS_BUSY       0x80
  37
  38 /* Type classes for Plug-and-Play probe.  */
  39 typedef enum {
  40         PARPORT_CLASS_LEGACY = 0,       /* Non-IEEE1284 device */
  41         PARPORT_CLASS_PRINTER,
  42         PARPORT_CLASS_MODEM,
  43         PARPORT_CLASS_NET,
  44         PARPORT_CLASS_HDC,              /* Hard disk controller */
  45         PARPORT_CLASS_PCMCIA,
  46         PARPORT_CLASS_MEDIA,            /* Multimedia device */
  47         PARPORT_CLASS_FDC,              /* Floppy disk controller */
  48         PARPORT_CLASS_PORTS,
  49         PARPORT_CLASS_SCANNER,
  50         PARPORT_CLASS_DIGCAM,
  51         PARPORT_CLASS_OTHER,            /* Anything else */
  52         PARPORT_CLASS_UNSPEC,           /* No CLS field in ID */
  53         PARPORT_CLASS_SCSIADAPTER
  54 } parport_device_class;
  55
  56 /* The "modes" entry in parport is a bit field representing the
  57    capabilities of the hardware. */
  58 #define PARPORT_MODE_PCSPP      (1<<0) /* IBM PC registers available. */
  59 #define PARPORT_MODE_TRISTATE   (1<<1) /* Can tristate. */
  60 #define PARPORT_MODE_EPP        (1<<2) /* Hardware EPP. */
  61 #define PARPORT_MODE_ECP        (1<<3) /* Hardware ECP. */
  62 #define PARPORT_MODE_COMPAT     (1<<4) /* Hardware 'printer protocol'. */
  63 #define PARPORT_MODE_DMA        (1<<5) /* Hardware can DMA. */
  64 #define PARPORT_MODE_SAFEININT  (1<<6) /* SPP registers accessible in IRQ. */
  65
  66 /* IEEE1284 modes:
  67    Nibble mode, byte mode, ECP, ECPRLE and EPP are their own
  68    'extensibility request' values.  Others are special.
  69    'Real' ECP modes must have the IEEE1284_MODE_ECP bit set.  */
  70 #define IEEE1284_MODE_NIBBLE             0
  71 #define IEEE1284_MODE_BYTE              (1<<0)
  72 #define IEEE1284_MODE_COMPAT            (1<<8)
  73 #define IEEE1284_MODE_BECP              (1<<9) /* Bounded ECP mode */
  74 #define IEEE1284_MODE_ECP               (1<<4)
  75 #define IEEE1284_MODE_ECPRLE            (IEEE1284_MODE_ECP | (1<<5))
  76 #define IEEE1284_MODE_ECPSWE            (1<<10) /* Software-emulated */
  77 #define IEEE1284_MODE_EPP               (1<<6)
  78 #define IEEE1284_MODE_EPPSL             (1<<11) /* EPP 1.7 */
  79 #define IEEE1284_MODE_EPPSWE            (1<<12) /* Software-emulated */
  80 #define IEEE1284_DEVICEID               (1<<2)  /* This is a flag */
  81 #define IEEE1284_EXT_LINK               (1<<14) /* This flag causes the
  82                                                  * extensibility link to
  83                                                  * be requested, using
  84                                                  * bits 0-6. */
  85
  86 /* For the benefit of parport_read/write, you can use these with
  87  * parport_negotiate to use address operations.  They have no effect
  88  * other than to make parport_read/write use address transfers. */
  89 #define IEEE1284_ADDR                   (1<<13) /* This is a flag */
  90 #define IEEE1284_DATA                    0      /* So is this */
  91
  92 /* Flags for block transfer operations. */
  93 #define PARPORT_EPP_FAST                (1<<0) /* Unreliable counts. */
  94 #define PARPORT_W91284PIC               (1<<1) /* have a Warp9 w91284pic in the device */
  95
  96 /* The rest is for the kernel only */
  97 #ifdef __KERNEL__
  98
  99 #include <linux/config.h>
 100 #include <linux/jiffies.h>
 101 #include <linux/proc_fs.h>
 102 #include <linux/spinlock.h>
 103 #include <linux/wait.h>
 104 #include <asm/system.h>
 105 #include <asm/ptrace.h>
 106 #include <asm/semaphore.h>
 107
 108 /* Define this later. */
 109 struct parport;
 110 struct pardevice;
 111
 112 struct pc_parport_state {
 113         unsigned int ctr;
 114         unsigned int ecr;
 115 };
 116
 117 struct ax_parport_state {
 118         unsigned int ctr;
 119         unsigned int ecr;
 120         unsigned int dcsr;
 121 };
 122
 123 /* used by both parport_amiga and parport_mfc3 */
 124 struct amiga_parport_state {
 125        unsigned char data;     /* ciaa.prb */
 126        unsigned char datadir;  /* ciaa.ddrb */
 127        unsigned char status;   /* ciab.pra & 7 */
 128        unsigned char statusdir;/* ciab.ddrb & 7 */
 129 };
 130
 131 struct parport_state {
 132         union {
 133                 struct pc_parport_state pc;
 134                 /* ARC has no state. */
 135                 struct ax_parport_state ax;
 136                 struct amiga_parport_state amiga;
 137                 /* Atari has not state. */
 138                 void *misc;
 139         } u;
 140 };
 141
 142 struct parport_operations {
 143         /* IBM PC-style virtual registers. */
 144         void (*write_data)(struct parport *, unsigned char);
 145         unsigned char (*read_data)(struct parport *);
 146
 147         void (*write_control)(struct parport *, unsigned char);
 148         unsigned char (*read_control)(struct parport *);
 149         unsigned char (*frob_control)(struct parport *, unsigned char mask,
 150                                       unsigned char val);
 151
 152         unsigned char (*read_status)(struct parport *);
 153
 154         /* IRQs. */
 155         void (*enable_irq)(struct parport *);
 156         void (*disable_irq)(struct parport *);
 157
 158         /* Data direction. */
 159         void (*data_forward) (struct parport *);
 160         void (*data_reverse) (struct parport *);
 161
 162         /* For core parport code. */
 163         void (*init_state)(struct pardevice *, struct parport_state *);
 164         void (*save_state)(struct parport *, struct parport_state *);
 165         void (*restore_state)(struct parport *, struct parport_state *);
 166
 167         /* Block read/write */
 168         size_t (*epp_write_data) (struct parport *port, const void *buf,
 169                                   size_t len, int flags);
 170         size_t (*epp_read_data) (struct parport *port, void *buf, size_t len,
 171                                  int flags);
 172         size_t (*epp_write_addr) (struct parport *port, const void *buf,
 173                                   size_t len, int flags);
 174         size_t (*epp_read_addr) (struct parport *port, void *buf, size_t len,
 175                                  int flags);
 176
 177         size_t (*ecp_write_data) (struct parport *port, const void *buf,
 178                                   size_t len, int flags);
 179         size_t (*ecp_read_data) (struct parport *port, void *buf, size_t len,
 180                                  int flags);
 181         size_t (*ecp_write_addr) (struct parport *port, const void *buf,
 182                                   size_t len, int flags);
 183
 184         size_t (*compat_write_data) (struct parport *port, const void *buf,
 185                                      size_t len, int flags);
 186         size_t (*nibble_read_data) (struct parport *port, void *buf,
 187                                     size_t len, int flags);
 188         size_t (*byte_read_data) (struct parport *port, void *buf,
 189                                   size_t len, int flags);
 190         struct module *owner;
 191 };
 192
 193 struct parport_device_info {
 194         parport_device_class class;
 195         const char *class_name;
 196         const char *mfr;
 197         const char *model;
 198         const char *cmdset;
 199         const char *description;
 200 };
 201
 202 /* Each device can have two callback functions:
 203  *  1) a preemption function, called by the resource manager to request
 204  *     that the driver relinquish control of the port.  The driver should
 205  *     return zero if it agrees to release the port, and nonzero if it
 206  *     refuses.  Do not call parport_release() - the kernel will do this
 207  *     implicitly.
 208  *
 209  *  2) a wake-up function, called by the resource manager to tell drivers
 210  *     that the port is available to be claimed.  If a driver wants to use
 211  *     the port, it should call parport_claim() here.
 212  */
 213
 214 /* A parallel port device */
 215 struct pardevice {
 216         const char *name;
 217         struct parport *port;
 218         int daisy;
 219         int (*preempt)(void *);
 220         void (*wakeup)(void *);
 221         void *private;
 222         void (*irq_func)(int, void *, struct pt_regs *);
 223         unsigned int flags;
 224         struct pardevice *next;
 225         struct pardevice *prev;
 226         struct parport_state *state;     /* saved status over preemption */
 227         wait_queue_head_t wait_q;
 228         unsigned long int time;
 229         unsigned long int timeslice;
 230         volatile long int timeout;
 231         unsigned long waiting;           /* long req'd for set_bit --RR */
 232         struct pardevice *waitprev;
 233         struct pardevice *waitnext;
 234         void * sysctl_table;
 235 };
 236
 237 /* IEEE1284 information */
 238
 239 /* IEEE1284 phases. These are exposed to userland through ppdev IOCTL
 240  * PP[GS]ETPHASE, so do not change existing values. */
 241 enum ieee1284_phase {
 242         IEEE1284_PH_FWD_DATA,
 243         IEEE1284_PH_FWD_IDLE,
 244         IEEE1284_PH_TERMINATE,
 245         IEEE1284_PH_NEGOTIATION,
 246         IEEE1284_PH_HBUSY_DNA,
 247         IEEE1284_PH_REV_IDLE,
 248         IEEE1284_PH_HBUSY_DAVAIL,
 249         IEEE1284_PH_REV_DATA,
 250         IEEE1284_PH_ECP_SETUP,
 251         IEEE1284_PH_ECP_FWD_TO_REV,
 252         IEEE1284_PH_ECP_REV_TO_FWD,
 253         IEEE1284_PH_ECP_DIR_UNKNOWN,
 254 };
 255 struct ieee1284_info {
 256         int mode;
 257         volatile enum ieee1284_phase phase;
 258         struct semaphore irq;
 259 };
 260
 261 /* A parallel port */
 262 struct parport {
 263         unsigned long base;     /* base address */
 264         unsigned long base_hi;  /* base address (hi - ECR) */
 265         unsigned int size;      /* IO extent */
 266         const char *name;
 267         unsigned int modes;
 268         int irq;                /* interrupt (or -1 for none) */
 269         int dma;
 270         int muxport;            /* which muxport (if any) this is */
 271         int portnum;            /* which physical parallel port (not mux) */
 272
 273         struct parport *physport;
 274                                 /* If this is a non-default mux
 275                                    parport, i.e. we're a clone of a real
 276                                    physical port, this is a pointer to that
 277                                    port. The locking is only done in the
 278                                    real port.  For a clone port, the
 279                                    following structure members are
 280                                    meaningless: devices, cad, muxsel,
 281                                    waithead, waittail, flags, pdir,
 282                                    ieee1284, *_lock.
 283
 284                                    It this is a default mux parport, or
 285                                    there is no mux involved, this points to
 286                                    ourself. */
 287
 288         struct pardevice *devices;
 289         struct pardevice *cad;  /* port owner */
 290         int daisy;              /* currently selected daisy addr */
 291         int muxsel;             /* currently selected mux port */
 292
 293         struct pardevice *waithead;
 294         struct pardevice *waittail;
 295
 296         struct list_head list;
 297         unsigned int flags;
 298
 299         void *sysctl_table;
 300         struct parport_device_info probe_info[5]; /* 0-3 + non-IEEE1284.3 */
 301         struct ieee1284_info ieee1284;
 302
 303         struct parport_operations *ops;
 304         void *private_data;     /* for lowlevel driver */
 305
 306         int number;             /* port index - the `n' in `parportn' */
 307         spinlock_t pardevice_lock;
 308         spinlock_t waitlist_lock;
 309         rwlock_t cad_lock;
 310
 311         int spintime;
 312         atomic_t ref_count;
 313
 314         struct list_head full_list;
 315         struct parport *slaves[3];
 316 };
 317
 318 #define DEFAULT_SPIN_TIME 500 /* us */
 319
 320 struct parport_driver {
 321         const char *name;
 322         void (*attach) (struct parport *);
 323         void (*detach) (struct parport *);
 324         struct list_head list;
 325 };
 326
 327 /* parport_register_port registers a new parallel port at the given
 328    address (if one does not already exist) and returns a pointer to it.
 329    This entails claiming the I/O region, IRQ and DMA.  NULL is returned
 330    if initialisation fails. */
 331 struct parport *parport_register_port(unsigned long base, int irq, int dma,
 332                                       struct parport_operations *ops);
 333
 334 /* Once a registered port is ready for high-level drivers to use, the
 335    low-level driver that registered it should announce it.  This will
 336    call the high-level drivers' attach() functions (after things like
 337    determining the IEEE 1284.3 topology of the port and collecting
 338    DeviceIDs). */
 339 void parport_announce_port (struct parport *port);
 340
 341 /* Unregister a port. */
 342 extern void parport_remove_port(struct parport *port);
 343
 344 /* Register a new high-level driver. */
 345 extern int parport_register_driver (struct parport_driver *);
 346
 347 /* Unregister a high-level driver. */
 348 extern void parport_unregister_driver (struct parport_driver *);
 349
 350 /* If parport_register_driver doesn't fit your needs, perhaps
 351  * parport_find_xxx does. */
 352 extern struct parport *parport_find_number (int);
 353 extern struct parport *parport_find_base (unsigned long);
 354
 355 /* Reference counting for ports. */
 356 extern struct parport *parport_get_port (struct parport *);
 357 extern void parport_put_port (struct parport *);
 358
 359 /* parport_register_device declares that a device is connected to a
 360    port, and tells the kernel all it needs to know.
 361    - pf is the preemption function (may be NULL for no callback)
 362    - kf is the wake-up function (may be NULL for no callback)
 363    - irq_func is the interrupt handler (may be NULL for no interrupts)
 364    - handle is a user pointer that gets handed to callback functions.  */
 365 struct pardevice *parport_register_device(struct parport *port,
 366                           const char *name,
 367                           int (*pf)(void *), void (*kf)(void *),
 368                           void (*irq_func)(int, void *, struct pt_regs *),
 369                           int flags, void *handle);
 370
 371 /* parport_unregister unlinks a device from the chain. */
 372 extern void parport_unregister_device(struct pardevice *dev);
 373
 374 /* parport_claim tries to gain ownership of the port for a particular
 375    driver.  This may fail (return non-zero) if another driver is busy.
 376    If this driver has registered an interrupt handler, it will be
 377    enabled.  */
 378 extern int parport_claim(struct pardevice *dev);
 379
 380 /* parport_claim_or_block is the same, but sleeps if the port cannot
 381    be claimed.  Return value is 1 if it slept, 0 normally and -errno
 382    on error.  */
 383 extern int parport_claim_or_block(struct pardevice *dev);
 384
 385 /* parport_release reverses a previous parport_claim.  This can never
 386    fail, though the effects are undefined (except that they are bad)
 387    if you didn't previously own the port.  Once you have released the
 388    port you should make sure that neither your code nor the hardware
 389    on the port tries to initiate any communication without first
 390    re-claiming the port.  If you mess with the port state (enabling
 391    ECP for example) you should clean up before releasing the port. */
 392
 393 extern void parport_release(struct pardevice *dev);
 394
 395 /**
 396  * parport_yield - relinquish a parallel port temporarily
 397  * @dev: a device on the parallel port
 398  *
 399  * This function relinquishes the port if it would be helpful to other
 400  * drivers to do so.  Afterwards it tries to reclaim the port using
 401  * parport_claim(), and the return value is the same as for
 402  * parport_claim().  If it fails, the port is left unclaimed and it is
 403  * the driver's responsibility to reclaim the port.
 404  *
 405  * The parport_yield() and parport_yield_blocking() functions are for
 406  * marking points in the driver at which other drivers may claim the
 407  * port and use their devices.  Yielding the port is similar to
 408  * releasing it and reclaiming it, but is more efficient because no
 409  * action is taken if there are no other devices needing the port.  In
 410  * fact, nothing is done even if there are other devices waiting but
 411  * the current device is still within its "timeslice".  The default
 412  * timeslice is half a second, but it can be adjusted via the /proc
 413  * interface.
 414  **/
 415 static __inline__ int parport_yield(struct pardevice *dev)
 416 {
 417         unsigned long int timeslip = (jiffies - dev->time);
 418         if ((dev->port->waithead == NULL) || (timeslip < dev->timeslice))
 419                 return 0;
 420         parport_release(dev);
 421         return parport_claim(dev);
 422 }
 423
 424 /**
 425  * parport_yield_blocking - relinquish a parallel port temporarily
 426  * @dev: a device on the parallel port
 427  *
 428  * This function relinquishes the port if it would be helpful to other
 429  * drivers to do so.  Afterwards it tries to reclaim the port using
 430  * parport_claim_or_block(), and the return value is the same as for
 431  * parport_claim_or_block().
 432  **/
 433 static __inline__ int parport_yield_blocking(struct pardevice *dev)
 434 {
 435         unsigned long int timeslip = (jiffies - dev->time);
 436         if ((dev->port->waithead == NULL) || (timeslip < dev->timeslice))
 437                 return 0;
 438         parport_release(dev);
 439         return parport_claim_or_block(dev);
 440 }
 441
 442 /* Flags used to identify what a device does. */
 443 #define PARPORT_DEV_TRAN                0       /* WARNING !! DEPRECATED !! */
 444 #define PARPORT_DEV_LURK                (1<<0)  /* WARNING !! DEPRECATED !! */
 445 #define PARPORT_DEV_EXCL                (1<<1)  /* Need exclusive access. */
 446
 447 #define PARPORT_FLAG_EXCL               (1<<1)  /* EXCL driver registered. */
 448
 449 /* IEEE1284 functions */
 450 extern void parport_ieee1284_interrupt (int, void *, struct pt_regs *);
 451 extern int parport_negotiate (struct parport *, int mode);
 452 extern ssize_t parport_write (struct parport *, const void *buf, size_t len);
 453 extern ssize_t parport_read (struct parport *, void *buf, size_t len);
 454
 455 #define PARPORT_INACTIVITY_O_NONBLOCK 1
 456 extern long parport_set_timeout (struct pardevice *, long inactivity);
 457
 458 extern int parport_wait_event (struct parport *, long timeout);
 459 extern int parport_wait_peripheral (struct parport *port,
 460                                     unsigned char mask,
 461                                     unsigned char val);
 462 extern int parport_poll_peripheral (struct parport *port,
 463                                     unsigned char mask,
 464                                     unsigned char val,
 465                                     int usec);
 466
 467 /* For architectural drivers */
 468 extern size_t parport_ieee1284_write_compat (struct parport *,
 469                                              const void *, size_t, int);
 470 extern size_t parport_ieee1284_read_nibble (struct parport *,
 471                                             void *, size_t, int);
 472 extern size_t parport_ieee1284_read_byte (struct parport *,
 473                                           void *, size_t, int);
 474 extern size_t parport_ieee1284_ecp_read_data (struct parport *,
 475                                               void *, size_t, int);
 476 extern size_t parport_ieee1284_ecp_write_data (struct parport *,
 477                                                const void *, size_t, int);
 478 extern size_t parport_ieee1284_ecp_write_addr (struct parport *,
 479                                                const void *, size_t, int);
 480 extern size_t parport_ieee1284_epp_write_data (struct parport *,
 481                                                const void *, size_t, int);
 482 extern size_t parport_ieee1284_epp_read_data (struct parport *,
 483                                               void *, size_t, int);
 484 extern size_t parport_ieee1284_epp_write_addr (struct parport *,
 485                                                const void *, size_t, int);
 486 extern size_t parport_ieee1284_epp_read_addr (struct parport *,
 487                                               void *, size_t, int);
 488
 489 /* IEEE1284.3 functions */
 490 extern int parport_daisy_init (struct parport *port);
 491 extern void parport_daisy_fini (struct parport *port);
 492 extern struct pardevice *parport_open (int devnum, const char *name,
 493                                        int (*pf) (void *),
 494                                        void (*kf) (void *),
 495                                        void (*irqf) (int, void *,
 496                                                      struct pt_regs *),
 497                                        int flags, void *handle);
 498 extern void parport_close (struct pardevice *dev);
 499 extern ssize_t parport_device_id (int devnum, char *buffer, size_t len);
 500 extern int parport_device_num (int parport, int mux, int daisy);
 501 extern void parport_daisy_deselect_all (struct parport *port);
 502 extern int parport_daisy_select (struct parport *port, int daisy, int mode);
 503
 504 /* Lowlevel drivers _can_ call this support function to handle irqs.  */
 505 static __inline__ void parport_generic_irq(int irq, struct parport *port,
 506                                            struct pt_regs *regs)
 507 {
 508         parport_ieee1284_interrupt (irq, port, regs);
 509         read_lock(&port->cad_lock);
 510         if (port->cad && port->cad->irq_func)
 511                 port->cad->irq_func(irq, port->cad->private, regs);
 512         read_unlock(&port->cad_lock);
 513 }
 514
 515 /* Prototypes from parport_procfs */
 516 extern int parport_proc_register(struct parport *pp);
 517 extern int parport_proc_unregister(struct parport *pp);
 518 extern int parport_device_proc_register(struct pardevice *device);
 519 extern int parport_device_proc_unregister(struct pardevice *device);
 520
 521 /* If PC hardware is the only type supported, we can optimise a bit.  */
 522 #if !defined(CONFIG_PARPORT_NOT_PC)
 523
 524 #include <linux/parport_pc.h>
 525 #define parport_write_data(p,x)            parport_pc_write_data(p,x)
 526 #define parport_read_data(p)               parport_pc_read_data(p)
 527 #define parport_write_control(p,x)         parport_pc_write_control(p,x)
 528 #define parport_read_control(p)            parport_pc_read_control(p)
 529 #define parport_frob_control(p,m,v)        parport_pc_frob_control(p,m,v)
 530 #define parport_read_status(p)             parport_pc_read_status(p)
 531 #define parport_enable_irq(p)              parport_pc_enable_irq(p)
 532 #define parport_disable_irq(p)             parport_pc_disable_irq(p)
 533 #define parport_data_forward(p)            parport_pc_data_forward(p)
 534 #define parport_data_reverse(p)            parport_pc_data_reverse(p)
 535
 536 #else  /*  !CONFIG_PARPORT_NOT_PC  */
 537
 538 /* Generic operations vector through the dispatch table. */
 539 #define parport_write_data(p,x)            (p)->ops->write_data(p,x)
 540 #define parport_read_data(p)               (p)->ops->read_data(p)
 541 #define parport_write_control(p,x)         (p)->ops->write_control(p,x)
 542 #define parport_read_control(p)            (p)->ops->read_control(p)
 543 #define parport_frob_control(p,m,v)        (p)->ops->frob_control(p,m,v)
 544 #define parport_read_status(p)             (p)->ops->read_status(p)
 545 #define parport_enable_irq(p)              (p)->ops->enable_irq(p)
 546 #define parport_disable_irq(p)             (p)->ops->disable_irq(p)
 547 #define parport_data_forward(p)            (p)->ops->data_forward(p)
 548 #define parport_data_reverse(p)            (p)->ops->data_reverse(p)
 549
 550 #endif /*  !CONFIG_PARPORT_NOT_PC  */
 551
 552 #endif /* __KERNEL__ */
 553 #endif /* _PARPORT_H_ */